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Achieving high currents on PCBs with fine-pitch SMD components

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HereBeDragons
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re: Achieving high currents on PCBs with fine-pitch SMD components
HereBeDragons   4/18/2011 2:54:47 AM
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This sounds very much like a hybrid of conventional PCB wiring and the old "multiwire" system, used back in the 70-80's where components were interconnected using machine-routed insulated wires embedded in a non-conducting matrix.

_hm
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re: Achieving high currents on PCBs with fine-pitch SMD components
_hm   4/11/2011 7:39:45 PM
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Peter - Does this "Wirelaid Technology" has been approved by IPC? Most of the design and manufacturing vendor do have to comply with IPC standard. Without IPC standard, how effective will be this technology?

docdivakar
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re: Achieving high currents on PCBs with fine-pitch SMD components
docdivakar   4/11/2011 5:32:05 PM
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I don't know what is new about "Wirelaid technology" that is being discussed here -I have seen copper plugs of all dimensions incorporated in PCB stackups for ages now! As others commented above, the article leaves out many details. For one, I would have liked to see what reliability tests were done to address the "high" current traces. Also there is no metric describing the highest current density (A/cm^2 or similar metric) in the design that raised issues about current crowding if any. The article overall falls short on the technical details. Dr. MP Divakar

Robotics Developer
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re: Achieving high currents on PCBs with fine-pitch SMD components
Robotics Developer   3/28/2011 6:06:53 PM
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The article hints at a solution but I am not sure the "wirelaid" approach is cost effective or achievable for most PCB fabs. I would have liked more details like cost/benefits, applicability to general (or does wirelaid need specialized) PCB fabricators, other options explored (fine pitch on a daughter card, differing copper thicknesses - thick inner layers with a thin outer). There has got to be multiple solutions to this problem but they were not presented nor explored.

Sanjib.A
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re: Achieving high currents on PCBs with fine-pitch SMD components
Sanjib.A   3/27/2011 4:00:57 PM
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It is very difficult to comprehend from Figure 4. as the texts are not clearly visible. Although it is very useful to learn about the wirelaid technology, it would be great if information about the cost premium with respect to the standard PCBs of comparable size & number of layers is provided?

vrheaume
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re: Achieving high currents on PCBs with fine-pitch SMD components
vrheaume   3/26/2011 2:02:08 AM
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typo: "Thick cooper stackup design" should be "Thick copper stackup design" (cooper becomes copper) Interesting article; I have been involved with projects that required routing some tens of amps on a PCB, and I know it's not easy...

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